Raw-tallow substitute for lubricating purposes and process for manufacturing the same.



, nnrran stares earner canton KARL ENGEL, OF HANOVER, GERMANY.

,IBAAW-TA LL OW SUBSTITUTE-FOR LUBRICATING IURPOE AND PBOCE SS MANU FACTUBING THE SAME."

No Drawing.'

To all whom at may concern:

Be it known that I, KARL Essen, merchant, citizen of'Germany, subject of the King of Prussia and Emperor of Germany, residing at Hanover, in the Kingdom of Prussia and Enipire'of Germany, have invented new and 'useful Improvements in 'Raw-Tallow Substitutes for Lubricating Purposes and Ifrocesses for Manufacturing the Same, of which the following is a specification. l a

For 'lubricating ships propeller shafts,-

truiinions in -rolling mills andthe like it has.

heretofore vbeengeneral to.employ-raw t al low"thatis to say unrendered tallow or adi-' pose tissue. Raw 'tallow is specially adaptedf'or thls purpose because the animal cellular tissue comprisedtherein aif'ords a hold for the tallow so that it can be stuffed into the-lubnicating openings and replenished even during the rpnningwhich is not possible when melted or rendered tallow which is very brittle, is employed. Rawtallow is however, very costly and furthermore canstance. It is not, however, possible in this manner to obtain a real substitute for raw fallow because the disconnected threads and filamentsdistributed mithe fattv mass are unable. to impart any intimate cohesion thereto and owing totheir small absorbent capacity they are not in a position to hold the fat to ether when it softens owing to increase of emperature. It is also impossible for those threads and filaments to be consumed inthe lubricating process as is the case with the cellular tissue of raw tallow.

but they remainin the bearings as an unworkable mass so that the bearings become cloggecl.

Now. in accordance with the present invention a substltute for raw tallow is provided by impregnating sponges or sponge Waste with a fatty mass which congeals on cooling. By the employment of sponges or Specification of Letters Patent. Patented Dec. 26, 3.911. Applicatioli filed August 3, 1911. Serial No. 642,111.

sponge Waste the structure. ofwhich is very similar to cellular-tissue all the advantages are attained which in the case of raw-tallow are due to this formation without the disach vantages of raw tallow being present. (Jon- 'trary to what is the case with raw tallow owing to the durability of the spongy substance the mass so obtained is not liable to deteriorate but can be stored for'a longtime .at high temperatures and in ,the' tropics while it excels in its cheapness especially as.

instead of fallow anv other consistent fat can beincorpprated with the sponges. I-.

'Pieces of any size can be torn off this raw tallow substitute and stuffed into the lubri eating holes and this stuffing can be replenished precisely as with raw 'tallow. v

In lubricating shafts and trunnions with this raw .tallow substitute the spongy sub- "stancelis consumed with the fat and therefore presents no impediment to the lubrication but the colloidal property of the spongy substance is rather favorable .to the lubricating process.' In "this connection it is of importancethat in the manufacture of the raw tallow substitute the spongy substance is rendered soft or pulpy owing to the factthat the consistent fat must be added to the sponge in the liquid state, that'is to say, that the manufacture must be effected by a hot process This causes the spongy substance to lose its hardness and become a more or less gelatinous mass which especially together with the fat can be readily completely disintegrated and consumed.

In the ma ufacturc of the raw tallow substitute the consistent in is molten by (heat:

,lng and the sponges or sponge wastes are brought into this molten mass whereby they are impregnated therewith. Upon cooling the fat congeals or becomes solid within the sponge. Y Having now d scribed my invention what I claim and desire to secure by Letters I-a'tent of the United States is:

1. A raw tallow subst' ts for lubricating purposes consisting of a sponge substance 100.

impregnated with a consistent fatty mass.

2; A raw tallow substitute for lubricating. purposes consisting of sponge waste impregnated with a consistent fatty mass. v

3. A process of manufacturing a raw tal- 10:5

low substitute for lubricating, which r0n- In testimory whereof I have heretmto set my hand in presence of twesubscribmg witl0 nesses.

I KARL ENGEL. Witnesses ROBERT J .-THOMPBON, MARTA L. THOMPSON. 

